description:S8173-2 Solar Finder Solar searchSuitable for the search and positioning of the sunLength: 68mmDrum diameter: 31.7mm (1.25") Center with 2MM positioning holes for coaxial calibration observation of the ground target and the main mirror before observing the sun.Total height: 92mmWeight: 150gType of installation:1, V-type finder2, 1/4 screw holes.Looking for the angle of the sun: about 30 degrees, effective visible time, 1.5 hours